#include <string.h>
#include <stdio.h>
#include <cstdlib>
#include <iostream>

using namespace std;

int main(void) {
	int a;
           cout<<"testing for c++\n";
           puts("Hello Viet, here is new world!!!");
           printf("Are you ready?\n");
           printf("day la gia tri cua a: "+a);
           printf("day la gia tri cua 10: "+10);
           printf("day la gia tri cua 10: "+20);

           return EXIT_SUCCESS;
}
